Here's one for the physics folks...
A ship sails straight from point "a" to point "b" across the ocean, it covers a distance of 3000Kms in 150Hrs, and it's average speed is 20Knt, however the actual distance from "a" to "b" is only 2500Kms and the ship's velocity is 16.667Knt, explain how this is possible?
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